What Is a Varifocal CCTV Lens?
A Varifocal CCTV lens allows users to manually adjust the focal length, enabling seamless transitions between wide-angle and telephoto views without swapping lenses. Unlike fixed-focal lenses, which lock into a single field of view, varifocal lenses like Towin’s 2.8-12mm model empower installers to fine-tune the camera’s perspective to suit specific environments. This flexibility is invaluable for applications requiring dynamic coverage, such as parking lots, retail stores, or large outdoor areas.
Towin’s 2.8-12mm Varifocal CCTV Lens: Key Parameters
Towin’s lens is engineered to meet the demands of modern surveillance systems. Below are its core specifications:
- 1. Focal Length Range: 2.8–12mm, covering wide-angle (2.8mm) to moderate telephoto (12mm) views.
- 2. Aperture Range: F1.4–C (auto-iris compatible), ensuring optimal light intake in varying conditions.
- 3. Mount Type: CS-mount, compatible with most standard CCTV cameras.
- 4. Image Format: Supports 1/3-inch and 1/2.7-inch sensors, catering to both budget and high-resolution cameras.
- 5. Manual Focus & Zoom: Smooth, precise adjustments via built-in controls.
- 6. IR Correction: Designed for infrared lighting, minimizing focus shifts in low-light or night-vision modes.
- 7. Operating Temperature: -20°C to 50°C, ideal for extreme climates.
- 8. Weight: Approximately 120g, lightweight yet durable.
These parameters make Towin’s lens a versatile choice for indoor and outdoor installations, where environmental factors like lighting and distance vary.
Why Choose Towin’s Varifocal CCTV Lens?
Towin distinguishes itself through innovation and reliability. Here’s what sets their Varifocal CCTV lens apart:
1. Superior Optical Clarity
The lens incorporates aspherical elements to reduce distortion and chromatic aberration, ensuring sharp, high-contrast images even at the edges of the frame. This is critical for identifying details like license plates or facial features in surveillance footage.
2. Robust Build Quality
Constructed with high-grade materials, Towin’s lens resists dust, moisture, and vandalism. Its metal housing and sealed design meet IP66 standards, making it suitable for harsh environments.
3. Easy Installation & Adjustment
The manual zoom and focus rings operate smoothly, allowing installers to calibrate the lens quickly. This reduces setup time and ensures optimal performance without specialized tools.
4. Cost-Effective Versatility
By eliminating the need for multiple fixed lenses, Towin’s varifocal model cuts costs and simplifies inventory management. One lens adapts to diverse scenarios, from narrow hallways to expansive courtyards.
5. Compatibility & Integration
Towin’s lens works seamlessly with major CCTV brands, including Hikvision, Dahua, and Axis. For detailed compatibility lists, visit their official website: Towin Lens Official Site.
FAQs
1. How does a varifocal lens differ from a zoom lens?
A varifocal lens requires manual adjustment of focal length, while a zoom lens automates this process. Varifocal lenses are typically more affordable and compact, making them ideal for static surveillance setups.
2. What is IR correction, and why does it matter?
IR correction ensures the lens focuses infrared light accurately, preventing blurry images in night-vision mode. Towin’s lens is optimized for IR use, maintaining clarity 24/7.
3. Is a 2.8-12mm lens suitable for large outdoor areas?
Absolutely. The 2.8mm wide-angle setting captures expansive views, while the 12mm telephoto setting zooms in on distant objects, offering flexibility for sprawling spaces.
4. How durable is Towin’s lens in extreme weather?
The lens operates reliably between -20°C and 50°C, with a sealed design that shields against humidity and dust. It’s built to withstand rain, snow, and heat without compromising performance.
Conclusion
In the competitive world of security technology, Towin’s 2.8-12mm Varifocal CCTV lens stands out for its blend of precision, durability, and affordability.